Recent content by atwarwithmaths

Thats perfect thanks.. Stupid me, I turn to wikipedia for everything else.!

Hi Guys/Girls, I have a maths exam tomorrow and there is a chance I could be asked to prove the cosine rule or sine rule. Well I have a simple proof of the sine rule but cannot find a simple one for the cosine. They all seem very advanced. Would anybody have a straightforward proof for...

n+m? I'm lost?

I think I may be getting it.. what variables would you introduce then? n: number of boxes e: number of empty boxes I need to discover an invariant for this. I've tried modelling a move: fill 1 box e:= e+7 n:=n+8 what possible invariants can I get from this? TBH I'm not sure if I...

Thanks for the quick reply Feldoh, I like what you're saying..it makes sense but I have to come up with an invariant. If I don't then I will get no marks at all

Hi, I've been given this problem for homework but I am completely baffled..I can't even translate the first move into values on the variables.. Any help on this would be greatly appreciated..Sorry if I'm being a bit abrupt here but my head is fried at this stage.. Thanks Guys...